(feature): TryGetOperation improvements

src/MaksIT.Core/Abstractions/Webapi/PatchRequestModelBase.cs

@@ -2,21 +2,34 @@
 using System.ComponentModel.DataAnnotations;
 
 using MaksIT.Core.Webapi.Models;
+using System.Diagnostics.CodeAnalysis;
 
 
 namespace MaksIT.Core.Abstractions.Webapi;
 
 public abstract class PatchRequestModelBase : RequestModelBase {
 
-  public Dictionary<string, PatchOperation> Operations = new Dictionary<string, PatchOperation>();
+  public Dictionary<string, PatchOperation>? Operations { get; set; }
 
   private bool HasNonNullPatchField => GetType()
     .GetProperties(BindingFlags.Public | BindingFlags.Instance)
     .Where(prop => prop.Name != nameof(Operations))
     .Any(prop => prop.GetValue(this) != null);
 
-  public bool TryGetOperation(string propertyName, out PatchOperation operation) {
-    return Operations.TryGetValue(propertyName, out operation);
+  public bool TryGetOperation(string propertyName, [NotNullWhen(true)] out PatchOperation? operation) {
+    if (Operations == null) {
+      operation = null;
+      return false;
+    }
+
+    if (Operations.TryGetValue(propertyName, out var tempOperation)) {
+      operation = tempOperation;
+      return true;
+    }
+    else {
+      operation = null;
+      return false;
+    }
   }
 
   public override IEnumerable<ValidationResult> Validate(ValidationContext validationContext) {
@@ -24,6 +37,7 @@ public abstract class PatchRequestModelBase : RequestModelBase {
       yield return new ValidationResult("At least one patch field must be provided", new string[] { "PatchField" });
     }
 
+    if (Operations != null) {
       foreach (var operation in Operations) {
         if (!Enum.IsDefined(typeof(PatchOperation), operation.Value)) {
           yield return new ValidationResult($"Invalid patch operation '{operation.Value}' for property '{operation.Key}'", new string[] { operation.Key });
@@ -31,3 +45,4 @@ public abstract class PatchRequestModelBase : RequestModelBase {
       }
     }
   }
+}

src/MaksIT.Core/MaksIT.Core.csproj

@@ -8,7 +8,7 @@
 
     <!-- NuGet package metadata -->
     <PackageId>MaksIT.Core</PackageId>
-    <Version>1.2.5</Version>
+    <Version>1.2.6</Version>
     <Authors>Maksym Sadovnychyy</Authors>
     <Company>MAKS-IT</Company>
     <Product>MaksIT.Core</Product>